全文获取类型
收费全文 | 805篇 |
免费 | 64篇 |
国内免费 | 11篇 |
专业分类
耳鼻咽喉 | 189篇 |
儿科学 | 46篇 |
妇产科学 | 9篇 |
基础医学 | 74篇 |
口腔科学 | 12篇 |
临床医学 | 47篇 |
内科学 | 172篇 |
皮肤病学 | 5篇 |
神经病学 | 4篇 |
特种医学 | 165篇 |
外科学 | 56篇 |
综合类 | 14篇 |
预防医学 | 17篇 |
眼科学 | 11篇 |
药学 | 40篇 |
中国医学 | 3篇 |
肿瘤学 | 16篇 |
出版年
2018年 | 8篇 |
2016年 | 6篇 |
2013年 | 13篇 |
2012年 | 14篇 |
2011年 | 18篇 |
2010年 | 14篇 |
2009年 | 14篇 |
2008年 | 16篇 |
2007年 | 18篇 |
2006年 | 17篇 |
2005年 | 13篇 |
2004年 | 23篇 |
2003年 | 21篇 |
2002年 | 16篇 |
2001年 | 17篇 |
2000年 | 18篇 |
1999年 | 17篇 |
1998年 | 20篇 |
1997年 | 23篇 |
1996年 | 19篇 |
1995年 | 26篇 |
1994年 | 27篇 |
1993年 | 25篇 |
1992年 | 21篇 |
1991年 | 21篇 |
1990年 | 21篇 |
1989年 | 34篇 |
1988年 | 33篇 |
1987年 | 35篇 |
1986年 | 36篇 |
1985年 | 37篇 |
1984年 | 14篇 |
1983年 | 30篇 |
1982年 | 16篇 |
1981年 | 7篇 |
1980年 | 9篇 |
1979年 | 6篇 |
1978年 | 7篇 |
1977年 | 7篇 |
1976年 | 10篇 |
1975年 | 12篇 |
1974年 | 13篇 |
1973年 | 15篇 |
1972年 | 5篇 |
1971年 | 9篇 |
1970年 | 7篇 |
1969年 | 11篇 |
1968年 | 15篇 |
1967年 | 8篇 |
1966年 | 11篇 |
排序方式: 共有880条查询结果,搜索用时 203 毫秒
1.
2.
V R Preedy C D Gove M Z Panos R Sherwood B Portmann R Williams T J Peters 《Alcohol and alcoholism (Oxford, Oxfordshire)》1990,25(6):641-649
(1) Liver cirrhosis was induced in male rats by treatment with carbon tetrachloride and phenobarbitone for 130-142 days. Detailed histological examination showed all livers from rats treated with carbon tetrachloride had annular fibrosis, necrosis, loss of normal hepatic architecture and other features that were consistent with an established micronodular cirrhosis. (2) Plasma biochemical analysis showed a significant reduction in total protein concentration (13%), which was due entirely to a reduction in plasma albumin (29%). There were also large increases in the plasma activities of alkaline phosphatase (110%) and aspartate aminotransferase (159%), when compared to phenobarbitone-treated controls. Plasma cholesterol was also increased (67%), but other plasma analytes were not significantly altered. (3) The soleus (Type I), plantaris (Type II) and gastrocnemius (Types I and II) muscles were dissected and examined for possible differential effects. There were minor reductions in all three muscle weights, but these changes did not reach statistical significance. The protein, RNA and DNA concentrations, total muscle content and content relative to body weight in cirrhotic rats were also not significantly altered in any of the muscles. Cirrhosis did not cause any perturbations in derived parameters, i.e. amount of synthetic apparatus per cell, RNA/DNA ratio, apparent cell size, protein/DNA ratio and the capacity for protein synthesis or RNA/protein ratio. (4) The gastrocnemius was fractionated into soluble, stromal and myofibrillar proteins. The concentrations and contents of all three proteins were unaltered in cirrhotic animals, compared to controls. (5) It is concluded that in this experimental model of cirrhosis there were no effects on those skeletal muscle variables which are strikingly altered by chronic alcohol feeding.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
3.
4.
D Portmann F Gharbi V Darrouzet J P Bébéar M Portmann 《Revue de laryngologie - otologie - rhinologie》1991,112(5):441-443
Post-traumatic facial palsies are generally observed after a transverse, longitudinal or comminuted fracture of the pars petrosa. Occasionally, the fracture does not involve the Fallopian aqueduct and another mechanism must be sought. The authors present a case of facial palsy that occurred after a Le Fort's fracture of the base of the skull, not involving the Fallopian aqueduct on the CT scan. This was confirmed by surgical exploration. The authors recall the possibility of a facial palsy through the stretching of the nerve by the petrosal nerve. 相似文献
5.
6.
7.
8.
Hepatic histological findings after transplantation for chronic hepatitis B virus infection, including a unique pattern of fibrosing cholestatic hepatitis 总被引:27,自引:0,他引:27
S E Davies B C Portmann J G O'Grady P M Aldis K Chaggar G J Alexander R Williams 《Hepatology (Baltimore, Md.)》1991,13(1):150-157
Long-term follow-up of 27 patients with hepatitis B virus-related chronic liver disease treated by transplantation showed that 23 had hepatitis B virus recurrence. In 13 patients late changes in the grafts were similar to those described in other series: minor abnormalities in five cases, chronic active hepatitis in five cases and non-hepatitis B virus-related graft dysfunction in three cases. Three patients had incomplete histological follow-up. Analysis of the histological changes and viral antigen expression in six cases revealed a distinct and novel pattern termed fibrosing cholestatic hepatitis. Development of fibrosing cholestatic hepatitis was associated with rapidly progressive graft dysfunction. It is postulated that this pattern of fibrosing cholestatic hepatitis develops because of a high cytoplasmic expression of viral antigens, including HBsAg. The remaining case had some features of fibrosing cholestatic hepatitis. The main histological features of this unique syndrome include thin, perisinusoidal bands of fibrosis extending from portal tracts to surround plates of ductular-type epithelium; prominent cholestasis; ground-glass transformation; and ballooning of hepatocytes with cell loss and mild mixed inflammatory reaction. 相似文献
9.
10.
G Nawara D Portmann L Costantino J P Bébéar 《Revue de laryngologie - otologie - rhinologie》1992,113(1):21-25
The authors have taken an interest in isolated vertiginous symptoms observed from free diving patients. In order to achieve a current bibliographic synthesis, they resume, on basis of 6 cases, the basic principles of the physics theories and the etiopathogenic mechanisms. They try so to help in the understanding of the vestibular clinical signs observed in this successful sport. 相似文献